Circuit Diagram. Circuit diagram for this IoT Smart Irrigation System is given below: Programming ESP8266 NodeMCU for Automatic Irrigation System. For programming the ESP8266 NodeMCU module, only the ...

Soil Moisture Sensor Pinout. The Soil moisture sensor a.k.a the soil humidity sensor, has four pins VCC, GND, Aout, Dout.These four pins can be used to get the soil moisture data from the sensor, The ...

This project uses a NodeMCU microcontroller to read the soil moisture level through an analog soil moisture sensor and display the value in percentage on the serial monitor. This is useful for ...